1962 dana 44

[42willysmb]

Looking for information on a 62 dana 44-1.
I swapped out my dead eaton for a gmc dana 44 that had a fresh build on it but the dana has 3.07 gears and my 236 can barely get moving in 1st gear but I can run 62 in 2nd gear on a straight away
the question is-----

can I use the ring and pinion from any dana 44? or are the 60-62 different
same question on bearings and install kits

Any info would be helpful...thank you!!

engine is good that is not the issue- new clutch and through out bearing too